CKEditor HTML view greyed out

The Problem

When running CKEditor (3.6.4 for ASP.NET) the editor loads but the HTML view is greyed out.
Switch to source mode and the HTML code is there but it does not render in HTML View


On further investigation this error only appears to occur in Internet Explorer 10, (IE10) when the browser is running in quirks mode.

To reproduce open the following URL which takes you to a earlier demo of CKEditor 3.6.4

In Internet Explorer do the following:

  1. Press F12 – to launch the developer Tools
  2. On the menubar – Look for Document Mode and change to Quirks mode


When in quirks mode the control greys out. Switch back the Standard mode and it works.

The Solution

You can control which mode the browser runs in, by adjusting the

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